Lavatory waste



June 2, 1936. ,R H. Z|NK|L ET AL 2,043,088

LAVATORY WAS TE @ew/ww MMMQ June 2, 1936- R. H. zlNKlL E1; AL 2,043,088

LAVATORY WASTE Filed May 2e, 1954 3 Sheets-sheet 2 une 2, 1936. v R. H. zlNKlL ET A1. 2,043,088

LAVATORY WASTE Filed May 26, 1 934 3 Sheets-Sheet 3 im* ull Patented June 2, 1936 UNITEDV STATES PATENT OFFICE chand, Maywood, Ill.,

assignors to Crane Co.,

Chicago, Ill., a corporation of Illinois Application May Z6, 1934, Serial No. 727,598

24 Claims.

This invention relates to lavatory waste constructions and to waste -plugs for use in such constructions.

A primary v object .of the invention is .to provide a lavatory with waste equipment which will afford an unobstructed discharge passage from the waste outlet of the `lavatory when the waste plug thereof is raised from .its seat, and which will be eicient, convenient, easily operable and reliable after .long periods of service.

In a Vconstruction embodying the invention, the waste plug, which may be operated from a conveniently -located lever, plunger or other device through concealed operating connections, is of the tubular .strainer type., i. e. the waste plug is of the type through which discharge takes place when the waste plug is raised from its seat; this type of waste plug being desired to obtain `an unobstructed vdischarge passage from the lavatory outlet.

Waste plugs of the type referred to have frequently ybeen diflicu'lt to operate, in prior constructions, `on account of binding or sticking of the waste plug in the vspud or waste outlet tube in which it is tted. Such binding has been due in some instances to frictional resistance, increased by corrosion of the parts or by the caking of ,soapy matter adhering to the parts. But the most serious cause of binding has been the accumulation and packing of hair, lint lor the like between the walls of the waste plug and spud. Al-lair is especially troublesome in this respect. 'Such material collecting between .the waste plug and spud tends to pack tightly, crea-ting a resistance to the proper operation of the waste plug and in course of time rendering it extremely difficult to eiect the 'full opening and closing movements of the waste plug. Difllculty in operating the waste plug is very annoying, and further the binding of the waste plug is objectionable because it imposes undue strain on the operating means, which may result in breakage or binding of the operative connections'and thus call for repairs in addition to the needed cleaning out of the waste plug andspud.

The difficulties mentioned vare obviated or greatly reduced by the present invention, which provides a construction of the waste plug or of the spud in which .it is .tted whereby hairs and bits `of lint contained in the Vdischarging waste water, or such of Vthem as may not pass into the interior of the waste plug, are caused to be washed down between the plug and spud through longitudinal washout channels, and are discharged with the wash water to the waste pipe. With the constructions herein described, the space between the lwaste plug and spud is kept substantially clear of hair, lint or the like, or at least 'free -of such accumulations as would offer material resista-nce to the proper operation of the waste 5 plug. Moreover these constructions minimize or reduce frictional resistance and opportunity for binding from corrosion or other causes.

A further feature of the invention is the provision of a lavatory Vwaste construction having lo the above indicated feature of improvement and a type of operating means whereby there Vis no obstruction of the passage to the waste pipe.

The 'invention includes a novel waste plug per se, and a form .of construction thereof which in addition to its advantages in use is also of advantage -from the standpoint Vof manufacture. The Vinvention `further includes a novel `method of manufacturing such waste plugs.

The invention will be described by reference to the accompanying drawings, and will be particularly pointed out and-defined by the claims iollowing the description.

In said drawings:

Fig. 1 "is a sectional view of aportion of a `lavatory, showing one practicable form of` waste construction as a whole embodying the invention.

Fig. 2 :is a detail section at `right angles toFig. 1 showing the manually operated means for working the lift rod and plug engaging means shown in Fig. 1.

Fig. 3 is a side elevation of the waste plug employed in Fig. 1, said waste plug being claimed herein 'per se.

Fig. 4 is ahorizontal section 'taken through the waste plug land 'spud Yon the line 4-4 of Fig. 1, showing kthe lift .yoke for the waste plug in topl plan View.

Fig. 5 is asimilar .section taken on the line 5--5 vof Fig. 1. 40

Figs. y6 and 7 show a tube from which .tubular waste plug bodies .are to be formed, Fig. 6 being an -end view and Fig. '7 a side elevation. The production of such a tube comprises a step or stepsin the method .herein described jof manufacturing the waste plug. v

Figs. 8 and 9 show a tubular waste plug body formed from the .aforesaid tube, Fig. 8 being atop plan view thereof and Fig. 9 a central vertical section.

Fig. 10 is a central vertical section of the cap and tubular .body of the waste plug ready for assembIy.

fFig. 1-1 is a bottom plan view of the tubular Fig. 14 is a cross section of the construction shown in Fig. 13.

Fig. 15 is a side elevation of a waste plug similar to that shown in Fig. 3 except that the guide ribs extend spirally instead of parallel with the axis of the plug.

Fig. 16 is a side elevation of the lower end portion of a waste plug of the type shown in Fig. 3 but having a different lower end construction adapted for a differentv form of lift device.

In Fig. 1, the numeral I denotes a lavatory having a waste outlet opening defined by the annular plug seat 2 at the upper end of the spud or waste outlet tube 3 which is inserted through the usual waste hole in the bottom wall of the lavatory bowl and retained by its flange 4 seated on the upper side of said wall in the depression around the waste hole. The lavatory has in its back wall an overflow outlet 5 and is constructed to provide an overflow chamber 6. The spud 3 extends through the bottom wall of the overflow chamber and is joined by the coupling I with the waste pipe 8. A water tight joint between the Spud and bottom wall 9 of the overflow chamber is provided by the packing I0. Dia-metrically opposite openings I I in the spud permit discharge of water from the overflow chamber through the spud to the waste pipe.

The waste outlet of the lavatory is controlled by a waste plug I2 slidably mounted in the spud, said waste plug comprising a reticulated tubular body having a head or cap I3 of larger diameter than the depending tubular part and which fits in the plug seat 2 to close the waste outlet. Upon raising the waste plug from its seat, water discharges from the lavatory through the plug, passing through the slots or water inlet openings I4 thereof into the interior of the plug and discharging from the lower open end thereof.

The waste plug is raised and lowered by manually operated means through concealed operating connections which in this instance are housed in the overflow chamber. The specific operating means shown is of the desirable type disclosed in United StatesV patent to Zinkil and Osterhage No. 1,816,458 of July 28', 1931. This operating means .comprises a vertically movable 'lift arm having rigid therewith a horizontally disposed yoke I5 rwhich straddles the waste plug, engaging portions .thereof exposed through the diametrically opposite openings I I on the spud. As indicated by dotted lines in Fig. 1, the openings II are of sufficient height to allow the extent of vertical movement of the yoke I5 which is required to elevate the waste plug to a position exposing the full lengths of its slots I4 above the plug seat 2.

The slots or water inlet openings of the waste plug are of such number and dimensions as to provide a water inlet area as great as the dislower end, and operated by means engaging the external sides of the waste plug, an unobstructed water discharge passage from the waste outlet opening of the lavatory is obtained.

The illustrative structure shown in Fig. 1, and as thus far described, is similar to that disclosed in the aforesaid patent except in respect to the waste plug I2 of said illustrative structure, which waste plug is of a novel construction affording pronounced adVantageS.

As shown in various figures of the drawings, the Waste plug I2 is constructed to provide longitudinal guide ribs I6, the slots I4 being formed between the ribs in the upper half of the plug. The guide ribs I6 extend from the head of the plug toits lower end, thereby providing water channels I I in line with the slots I4, said water channels I'I extending to the lower end of the plug and having open or unobstructed discharge ends. Consequently when the waste plug is raised to open position, the water will discharge from the lavatory not only through the plug ,by way of the slots I 4 but also between the plug and spud by way of the water channels I'l, with the effect of pronounced tendency of washing down and discharging below the plug all hairs, bits of lint or the like that fail to pass out through the slots I4, thus and lint that would in ordinary constructions be retained between the plug and spud. Moreover the plug is operable with less friction than in the case of a plug having a plain or unribbed cylindrical surface, and the opportunity for binding or sticking of the plug in the spud, from corrosion or caking of soapy matter is minimized.

A similar result would be obtainable with the use of a waste plug having a plain cylindrical exterior surface by employing a spud having its interior surface longitudinally ribbed to provide water channels in line with the slots or water inlet openings of the plug and extending below the plug and open at both the upper and lower ends, so as to provide for the ow of water downwardly between the plug and spud in a plurality of courses from the inlet slots as well as for flow through the plug. Such a construction is represented in Figs. 13 and 14, while in Fig. 12 a construction is shown in which both the waste plug and spud are formed with guide ribs and water washout channels.

In the specic construction of the waste plug I2 shown in Figs. 1 to 1l of the drawings, the slots I4 of the plug are provided wholly by the spaces or interstices between the ribs I6. slots may be of greater width than the ribs, so as to provide a relatively large area for admission of water to the interior of the plug. As shown more clearly in Figs. 4 and 6, the ribs may be formed so that the full width of the interstices between the outer faces of the ribs is utilized for the slots. The plug I 2 constructed as shown comprises the head I3, the circular series of spaced ribs I6, and the tubular lower part I8 having the said ribs formed thereon and projecting above the same, said tubular lower part of the plug being joined with the head by the upwardly projecting extensions of the ribs.

As shown more clearly in Fig. 10, the plug may be constructed in two parts, namely a tubular body member comprising the part I8 having the ribs I6 formed thereon and projecting above the same, and the separate cap or head I3 which is suitably secured to the upper end of said body member, i.'e. to the upper ends of the project- The ing ribs I6. The cap may be secured to the body member in any suitable manner, for instance by 'screwing it thereon or brazing it thereto. As shown the upper ends -of the ribs I-6 are entered into an annular groove I9 formed in the underside of the cap. A small circumferential groove is formed in the exterior surfaces of the ribs near their upper extremities, and the outer lower edge portion 2| of the cap is spun or swaged into the groove 20 for securely uniting the cap with the body member.

The construction of the plug in two pieces as just described is desirable as an incident of availing of the novel manufacturing method hereinafter described; however lit will be apparent that the plug could be cast or otherwise made in one piece, including the cap, if desired.

Near its lower end the plug I2 is formed with a circumferential groove 22 for engagement by the arms of the operating yoke I5. This groove 22 is formed in and across the ribs I6, the groove being interrupted by the channels between the ribs. To facilitate insertion of the plug into the yoke, the plug is formed at its lower end with diametrically opposite insert flats 23, consisting of at beveled portions the planes of which intersect the planes of diametrically opposite channels Il below the circumferential groove 22. These insert ats 23 are shown more clearly in Figs. 1 and 11. They permit the lower end of the plug to be forced between the arms of the yoke I5, slightly springing said arms, which will then snap into engagement with the groove 22. At diametrically opposite points midway between the insert ilats the portion of the plug having the groove 22 is provided with locking ats 24, i. e. flat surfaces on the ground of said groove. Thus the plug after it is inserted in the yoke I5 can be given a quarter turn, whereupon the yoke arms will snap into engagement with the locking flats 24, as shown more clearly in Fig. 5, thus holding the plug properly assembled in connection with the operating means, preventing it from becoming disengaged from the lavatory. In addition to the insert bevels 23, the entire lower extremity of the plug is preferably given a short tapered form by beveling the lower ends of all the ribs as indicated at 25.

The specific operating means shown as an il'- lustrative example in Fig. 1 (being that disclosed in the aforesaid Zinkil and Osterhage patent) is briefly explained thus: The yoke I5 is carried by an arm 26 rigidly attached to the vertical rod 2l which is adjustably secured in the tubular lift rod 28 guided for vertical motion in the guide 29. The rod 28 is provided at its upper end with a hook 30 which engages the oset or cranked portion 3| of a crank shaft 32 mounted in -a member 33 on the top of the back portion of the lavatory structure, which member is covered by the removable cap 34. The ends of the crank shaft 32 are integrally or rigidly connected with the ends of the arms 35 of a bifurcated lever having a handle 36. When the handle 3B is in the horizontal position shown in Fig. 2, the crank 3! projects downward as shown in Fig. 1 and the waste plug is in its seated or closed position. By swinging the handle 36 from the position shown to a horizontal position at the opposite side of the housing member 33, the lift rod is raised a suflicient distance to raise the waste plug to its full open position. The crank 3l is at an angle slightly less than 90 from the handle. Accordingly when the handle is thrown to the position to raise the waste plug, the vcrank will move slightly past a vertical or dead center position, so that the weight of the waste plug and its operating connections will hold the handle in the open position, preventing accidental closing movement of the waste plug. On the other hand the handle can be easily swung from open to closed position to effect the closing of the waste outlet. l

By the employment of a waste plug of the construction described, in connection with operating equipment whereby the plug is operated from a conveniently located manual device through operating connections located out of sight and operatively connected with the plug by means engaging the plug laterally, we provide a highly advantageous lavatory waste construction, characterized by an unobstructed waste outlet connection, and by a conveniently and easily operable apparatus which will always be reliable to effect the full opening and closing of the waste outlet.

Reference will now be made to a novel method of manufacturing vwaste plugs of the tubular strainer type, by which method plugs of the construction or character herein described can be produced in a practicable, efcient and economical manner. This involves constructing the plugs in two pieces as already explained. The cap I3 can be cheaply produced in quantities by any desired pressing or stamping operation. body member for assembly with the cap is produced as follows: First we provide a longitudinally ribbed tube. A tube of this character is shown in Figs. 6 and 7, being designated by the numeral 31. Such a tube may be made by cutting the longitudinal grooves therein, or it may be produced by any one of a number of methods of forming fluted tub-ing. This tube is then cut into rsections of the proper length for the tubular plug bodies. Each section is then bored in the upper half to the bottom of the ribs IB, thereby leaving openings between the ribs. Thus the tubular plug body is produce-d in the form shown in Figs. 8 and 9, except for the machining required to form the groove 22, insert flats 23, locking flats 24 and bevels 25 at the lower extremities of the ribs. If the plug is to be used with operating means employing a lift yoke, the machining operations for forming said groove 22, flats 23, 24 and bevels 25 are performed, and the finished body is then assembled and united with the cap as already described.

As hereinbefore indicated, it is within the contemplation of the present invention to provide a lavatory waste construction having either the waste plug or the spud or both formed with guide ribs and washout channels arranged for the described function of permitting discharge of waste water around the plug so as to keep the space between the plug and Spud sufficiently clear of accumulations of hair yor lint and the like to prevent binding of the plug or interference with its proper operation.

A construction in which the waste plug has a plain cylindrical exterior surface and is slidably mounted in an internally longitudinally ribbed spud which provides the washout channels, is represented in Figs. 13 and 14. In these iigures, 40 designates the plug, 4I the waterinlet slots thereof, 42 the spud, 43 the internal longitudinal guide ribs of the spud, and 44 the water washout channels which are opposite or in communication with the slots 4l and extend below the bottom of the plug. The lower part of the plug may be reduced in exterior diameter to provide the annular shoulder 45 for engagement by a lift yoke. The lower end of the plug is shown formed with diametrically opposite insert bevels 46. At intermediate diametrically opposite points are the square holes 41 which function similarly to locking flats for engagement by yoke arms.

A construction in which both the waste plug and spud are formed to provide longitudinal guide ribs and washout channels is shown in Fig. 12. In this figure, the waste plug may be of the same construction as in Figs. 1 to 11; namely it comprises the lower tubular part I8 having the guide ribs I6 formed thereon and extending thereupon, and the water inlet slots I4 being between the ribs in the upper part of the plug. The spud in Fig. l2 is designated by the numeral 42, its internal ribs by 43 and its channels by the numeral 44.

In Figs. 12 and 14, the spud is shown having twice as many grooves or channels as the number of water inlet slots of the plug, and the spacing of said grooves or channels is such that each rib of the plug will bear on one or two ribs of the spud. As shown in Fig. l2, each rib of the plug bears on one rib of the spud, so that each water inlet slot of the plug is opposite two channels of the spud, it being understood that the plug is held in this relation to the spud by engagement with the operating means. However each rib of the plug could bear on two ribs of the Spud, as shown in Fig. 14. Also, if preferred, the spud could have the same number of channels as the number of water inlet grooves in the plug, in which event the said water inlet slots should be opposite the said channels.

It is within the purview of the invention to arrange the guide ribs and washout channels, whether on the waste plug or in the spud, otherwise than vertical or parallel with the axis of the waste plug. For example, Fig. 15 shows a waste plug of a construction identical with that shown in Figs. 1 to 11 except that the ribs and channels in Fig. l5 extend spirally or at an inclination to the vertical. In Fig. 15, l2a designates the plug as a whole, I3 the head or cap thereof, I6EL its longitudinal ribs, I4at its water inlet slots between the ribs on the upper part of the plug, |13 the water washout channels between the ribs on the lower part of the plug, 22a the yoke groove, and 24a the insert flats or bevels.

A waste plug constructed as in Fig. 15 will function substantially or nearly as well as the waste plug shown in Figs. 1 and 3, so far as concerns the provision for washout of hair and lint by discharge of waste water through a plurality of channels around the plug; and, while it may oer a somewhat greater frictional resistance to movement than the plug shown in Figs. 1 and 3, it will have on the other hand an advantage in tending to keep all parts of the coacting surface of the spud 'quite clean by the movement of the inclined ribs over said surface. A waste plug of the character shown in Fig. 15 may be used either with a plain spud as in Fig. l or with a spud internally ribbed as in Figs. 12 and 14, the latter being an excellent combination.

The features of the yoke groove, insert flats and locking flats described with reference to the waste plug shown in Figs. 1 to 11 are employed where the waste plug is operated by a lift yoke, which is a desirable operating device particularly in a construction having the operating connections housed in the overflow chamber. However the invention in its broader` aspects is not intended to be limited to use of a lift yoke nor to any particular type of operating means nor to an arrangement of the operating means in the overflow chamber. It is possible without obstructing the discharge passage below the waste plug to operate the plug by means other than a lift yoke, for instance by means engaging the waste plug at one side only. Such operating means may comprise a lift arm rigid with a vertically movable operating rod, or a lever arm or the like, in which case the lower end portion of the waste plug, instead of being formed with the aforesaid adjunctive features for use with a lift yoke, may be formed with a bayonet slot for engagement by the end of such lift arm or lever arm. An illustrative construction is shown in Fig. 16, wherein 5U designates a waste plug of the type shown in Figs. l to ll but having its lower portion formed with a bayonet slot 5|. The end of a lift arm engaging said bayonet slot is indicated in dotted lines at 52 in Fig. 16. It is also possible to extend the waste plug below the bottom wall of the overow chamber and to connect it with operating means arranged below the lavatory but outside of such chamber. In this case the waste plug would be connected with the operating means through a lift yoke, lift arm, lever or the like housed in a boxing or housing incorporated in the waste line between the outlet chamber and the waste pipe 8.

From the foregoing it will be understood that the invention is susceptible of various forms of embodiment. The term lavatory is to be understood as including sinks, tubs and other receptacles to which the invention may be applicable.

What we claim as our invention, and desire to secure by Letters Patent, is:

1. A lavatory waste construction comprising a waste outlet tube, a waste plug slidably mounted therein comprising a longitudinally ribbed tubular body having a head to seat over the upper end of the waste tube and having vertical slots in the upper part thereof between the ribs thereof, said body having a 4circumferential groove in the ribs thereof below the said slots, a lift yoke engaging said circumferential groove, said tube having opposite openings to accommodate said yoke and its movement, operating means carrying said yoke, the lavatory being constructed with an overflow chamber housing the said waste outlet tube and operating means and yoke, and exposed manually operable means for operating said operating means.

2. A lavatory waste construction comprising a waste outlet tube, a waste plug slidably mounted therein comprising a longitudinally ribbed tubular body having a head to seat over the upper end of the waste tube and having vertical slots in the upper part thereof between the ribs there- 4an overflow chamber enclosing said waste outlet tube and lift rod and yoke, and said lift rod being guided and extending through the back part of the lavatory slab and having means on its upper end for raising and lowering the lift rod,

3. A lavatory waste construction comprising a waste outlet tube, a waste plug of the tubular strainer type slidably mounted therein, one or `both of said members having longitudinal guide ribs, said ribs providing channels whereby when the waste plug is in discharging position water not only discharges through the plug but also exteriorly thereof through said channels, concealed operating means for raising and lowering the waste plug operatively connected Jtherewith laterally thereof below its water inlet openings, whereby the discharge passage through the plug and tube is unobstructed,` the tube being laterally eut away to accommodate the connection between theplug and operating means and allow the movement thereof required to operate the plug, and exposed manually operated means for operating said operating mean-s.

4. A lavatory waste construction comprising a waste outlet: tube, a waste plug of the tubular strainer type slidably mounted therein, one or both of said members having longitudinal guide ribs, saidv ribs providing channels: whereby when the waste plug is in discharging position water not only discharges through the tubular part of the plug but also exteriorlythereof through said channels,` concealed operating means for raising and lowering the waste plug comprising a vertically movable horizontally disposed yoke embracing and connected with the waste plug below its water inlet openings, the waste outlet tube having lateral openings to accommodate the yoke and its movement, and exposed manually operated means for operating said operating means.

5. A lavatory waste construction comprising a waste outlet tube, a waste plug of the tubular .strainer type slidably mounted therein, one o-r both of said members having longitudinal guide ribs, said ribs providing channels whereby when the waste plug is in discharging position water not only discharges through the tubular part of the plug but also exteriorly thereof through said channels, concealed operating means for raising and lowering the waste plug operatively connected therewith laterally below the water inlet openings of the plug, the tube being laterally cut away to accommodate the connection between the plug and operating means and allow the movement thereof required to operate the plug, and exposed manually operated means for operating said operating means.

6. A lavatory waste construction comprising a waste outlet tube, a waste plug of the tubular strainer type slidably mounted therein, one or both of said members having longitudinal guide ribs, said ribs providing channels whereby when the waste plug is in discharging position water not only discharges through the plug but also exteriorly thereof through said channels, said plug having a circumferential groove below its water inlet openings, a lift yoke engaging said groove, the plug being formed at its lower end with opposite bevels to permit its insertion into the yoke, and means for operating the lift yoke.

7. A lavatory waste construction comprising a waste outlet tube, a waste plug slidably mounted therein comprising a longitudinally ribbed tubular body having a head to seat over the upper end of the waste tube and having vertical slots in the upper part thereof between the ribs thereof, said body having a circumferential groove in the ribs thereof below the said slots, and a lift yoke engaging said circumferential groove, said tube having opposite openings to accommodate said yoke and its movement.

8. A lavatory waste construction comprising a waste outlet tube and a waste plug of the tubular strainer type slidably mounted therein, one of said members `having longitudinal. guide ribs which provide the entire surface for sliding engagement with the other member.`

9.. A waste plug of the tubular strainer type having longitudinal guide ribs providing washout 5 channels in the exterior surface ofthe plug.

10. A lavatory spud having internal longitudinal guide ribs providing washout channels in the interior surface of the spud.

11. A waste plug comprising a head and a tubular body depending therefrom having an upper part provided with water inlet openings and an imperforate lower part, said body having longitudinal guide ribs extending from the head to the lower end providing washout channels in the 15 exterior surface of the plug.

12. A waste plug of the tubular strainer type having longitudinal slots providing water inlet openings and external longitudinal water channels extending from said openings to the lower end of the plug.

1,3. A waste plug of the tubular strainer type having longitudinal slots providingwater inlet openings and external longitudinal water channels extending from said openings to the lower end of the plug, the said slots, ribs and channels being spirally arranged.

14. A waste plug comprising a head and a tubular body depending therefrom, said tubular body comprising a series of spaced longitudinal ribs and an imperforate cylindrical lower part spaced from the head and connected therewith by said ribs, the spaces between the ribs providing water inlet slots in the upper part of the plug and external channels alined with said slots on the lower part of the plug.

l5. A waste plug comprising a head and a tubular body depending therefrom having a series of vertical slots therein and external channels alined with said slots and extending below the same and having open lower ends, said plug being formed below said slots with means for operative engagement by a lifting member.

16. A waste plug of the tubular strainer type having longitudinal guide ribs, said guide ribs being curcumferentally grooved for engagement by a lift yoke below the water inlet openings of the plug.

17. A waste plug of the tubular strainer type having longitudinal guide ribs, said guide ribs being circumferentially grooved for engagement by a lift yoke below the water inlet openings of the plug, the lower end of the plug being formed with opposite beveled portions providing'insert flats.

18. A waste plug of the tubular strainer type having longitudinal guide ribs, said guide ribs being circumferentially grooved for engagement by a lift yoke below the water inlet openings of the plug, the lower end of the plug being formed with opposite beveled portions providing insert flats, and the circumferentially groved part of the plug being formed with4 diametrically opposite locking flats between the insert flats.

19. A lavatory waste construction comprising a waste outlet tube and a waste plug of the tubular strainer type slidably mounted therein, one or both of said members having longitudinal guide ribs, said ribs providing washout channels between the two members, whereby when the waste plug is in discharging position water discharges into the waste outlet tube not only through the plug but also exteriorly thereof through said channels.

20. A lavatory waste construction comprising awaste outlet tube and a waste plug of the tubular strainer type slidably mounted therein, said plug having longitudinal guide ribs providing washout channels between the plug and tube, whereby when the waste plug is in discharging position water discharges into the waste outlet tube not only through the plug but also exteriorly thereof through said channels.

2l. A lavatory waste construction comprising a waste outlet tube and a waste plug of the tubular strainer type slidably mounted therein, said tube having longitudinal guide ribs providing washout channels between the plug and tube, whereby when the waste plug is in discharging position water discharges into the waste outlet tube not only through the plug but also exteriorly thereof through said channels.

22. A lavatory waste construction comprising a waste outlet tube and a Waste plug of the tubular strainer type slidably mounted therein, said members having longitudinal guide ribs, the ribs of the plug bearing on ribs of the tube, said ribs providing washout channels between the two members, whereby when the waste plug is in discharging position water discharges into the waste outlet tube not only through the plug but also exteriorly thereof through said channels.

23. A lavatory waste construction comprising a waste outlet tube and a waste plug of the tubular strainer type slidably mounted therein, each of said members having longitudinal guide ribs providing washout channels between the two members, there being twice as many ribs and grooves in the tube as in the plug, each rib of the plug bearing on one rib of the tube.

24. A lavatory waste construction comprising a waste outlet tube and a waste plug of the tubular strainer type slidably mounted therein, each of said members having longitudinal guide ribs providing washout channels between the two members, the ribs and grooves of one of said members being parallel with the axis of the tube and the ribs and grooves of the other member being 20 spirally arranged.

ROY H. ZINKIL. EUGENE W. MARCHAND. 

